<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        
        .backgroud {
            width: 1100px;
            height: auto;
            margin: 0 auto;
            background: seashell;
        }
        
        .header {
            background: salmon;
            width: 100%;
            height: 40px;
            float: left;
            /* text-align: center; */
        }
        
        .span {
            display: inline-block;
            width: 100px;
            text-align: center;
            font-size: larger;
            font-weight: bold;
            line-height: 40px;
        }
        
        .span2 {
            float: right;
            width: 100px;
            text-align: center;
            font-size: larger;
            font-weight: bold;
            line-height: 40px;
        }
        
        .span:hover {
            background: sienna;
        }
        
        .span2:hover {
            color: white;
        }
        
        .nav {
            width: 100%;
            height: 200px;
            background: skyblue;
            text-align: center;
        }
        
        .container {
            width: 100%;
            height: 600px;
        }
        
        .lf {
            float: left;
            width: 36%;
            height: 600px;
            background: seagreen;
        }
        
        .rt {
            float: right;
            width: 63%;
            height: 600px;
            background: saddlebrown;
        }
        
        .foot {
            background: slategray;
            width: 100%;
            height: 150px;
            text-align: center;
        }
        
        .banner {
            height: 400px;
            width: 100%;
            background: slateblue;
        }
    </style>
</head>

<body>
    <div class="backgroud">
        <header class="header">
            <span class="span">首页</span>
            <span class="span">内容</span>
            <span class="span">主页</span>
            <span class="span2">登录</span>
        </header>
        <div class="banner">banner</div>
        <nav class="nav">
            导航栏
        </nav>
        <div class="container">
            <div class="lf">left</div>
            <div class="rt">right</div>
        </div>
        <div class="foot">
            底部导航栏
        </div>
    </div>
</body>

</html>